SLVUC34 March   2021 TPS2521

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  3. 2Description
  4. 3Schematic
  5. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment and Set up
      1. 4.2.1 POWER SUPPLIES
      2. 4.2.2 METERS
      3. 4.2.3 OSCILLOSCOPE
      4. 4.2.4 LOADS
  6. 5Test Setup and Procedures
    1. 5.1 Start up the eFuse
    2. 5.2 Over Current Test
    3. 5.3 Output Hot-Short Test
    4. 5.4 Power Up into Short Test
    5. 5.5 Overvoltage Clamp Test
    6. 5.6 Reverse Current Blocking Test
  7. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  8. 7Bill Of Materials (BoM)

5.2 Over Current Test

Use the following instructions to perform over current test on TPS25210 eFuse:

  1. Place jumper J5 to an appropriate position to obtain required blanking period as per Table 4-3.
  2. Set the input supply voltage VIN to 5 V and current limit of 10 A and enable the power supply.
  3. Place jumper J6 in suitable position to set required current limit as per Table 4-3.
  4. Now apply an over load greater than the set current limit between VOUT and PGND (Use a resistive load to apply over current).
  5. The device responds to output over current condition by actively limiting the current after a user adjustable transient fault blanking interval. During active current limit, the output voltage will drop resulting in increased device power dissipation. If the device internal temperature exceeds the thermal shutdown threshold, the device will turn off.

Figure 5-4 shows an example of active current limit test on the TPS25210EVM

GUID-20210329-CA0I-WDTS-JW46-P81TJ31DR2CF-low.gifFigure 5-4 Over Current Response of TPS25210x for 4.44-A Current Limit Setting